Audio mixer



FIG. 1 is an upper perspective view showing the design at the open state;

FIG. 2 is a lower perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an upper perspective view showing the design at the closed state;

FIG. 10 is a lower perspective view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a rear view thereof;

FIG. 13 is a left-side view thereof;

FIG. 14 is a right-side view thereof;

FIG. 15 is a top view thereof; and,

FIG. 16 is a bottom view thereof. 

CLAIM I claim the ornamental design for an audio mixer, as shown and described. 